[server] Add negative cache for non-existent partition IDs in metadata requests#3511
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swuferhong wants to merge 1 commit into
Open
[server] Add negative cache for non-existent partition IDs in metadata requests#3511swuferhong wants to merge 1 commit into
swuferhong wants to merge 1 commit into
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Purpose
Linked issue: close #3510
During hourly partition rotation, clients holding stale partition IDs repeatedly trigger
ZooKeeper lookups that always return "not found". This adds unnecessary pressure on ZK.
The negative cache eliminates these redundant queries by remembering the "not found" result
for a configurable TTL period.
Brief change log
Tests
API and Format
Documentation